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<BODY><H2><a href="../contents.htm">Tcl8.6.11/Tk8.6.11 Documentation</a> <small>&gt;</small> <a href="contents.htm">Tcl Commands</a> <small>&gt;</small> eof</H2>
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<H3><A NAME="M2">NAME</A></H3>
eof &mdash; Check for end of file condition on channel
<H3><A NAME="M3">SYNOPSIS</A></H3>
<B>eof </B><I>channelId</I><BR>
<H3><A NAME="M4">DESCRIPTION</A></H3>
Returns 1 if an end of file condition occurred during the most
recent input operation on <I>channelId</I> (such as <B><A HREF="../TclCmd/gets.htm">gets</A></B>),
0 otherwise.
<P>
<I>ChannelId</I> must be an identifier for an open channel such as a
Tcl standard channel (<B><A HREF="../TclLib/GetStdChan.htm">stdin</A></B>, <B><A HREF="../TclLib/GetStdChan.htm">stdout</A></B>, or <B><A HREF="../TclLib/GetStdChan.htm">stderr</A></B>),
the return value from an invocation of <B><A HREF="../TclCmd/open.htm">open</A></B> or <B><A HREF="../TclCmd/socket.htm">socket</A></B>, or
the result of a channel creation command provided by a Tcl extension.
<H3><A NAME="M5">EXAMPLES</A></H3>
Read and print out the contents of a file line-by-line:
<P>
<PRE>set f [open somefile.txt]
while {1} {
    set line [gets $f]
    if {[<B>eof</B> $f]} {
        close $f
        break
    }
    puts &quot;Read line: $line&quot;
}</PRE>
<P>
Read and print out the contents of a file by fixed-size records:
<P>
<PRE>set f [open somefile.dat]
fconfigure $f -translation binary
set recordSize 40
while {1} {
    set record [read $f $recordSize]
    if {[<B>eof</B> $f]} {
        close $f
        break
    }
    puts &quot;Read record: $record&quot;
}</PRE>
<H3><A NAME="M6">SEE ALSO</A></H3>
<B><A HREF="../TclCmd/file.htm">file</A></B>, <B><A HREF="../TclCmd/open.htm">open</A></B>, <B><A HREF="../TclCmd/close.htm">close</A></B>, <B><A HREF="../TclCmd/fblocked.htm">fblocked</A></B>, <B><A HREF="../TclLib/StdChannels.htm">Tcl_StandardChannels</A></B>
<H3><A NAME="M7">KEYWORDS</A></H3>
<A href="../Keywords/C.htm#channel">channel</A>, <A href="../Keywords/E.htm#end of file">end of file</A>
<div class="copy">Copyright &copy; 1993 The Regents of the University of California.
<BR>Copyright &copy; 1994-1996 Sun Microsystems, Inc.
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